gps interference testing testing

[GeorgeC]

There is gps interference testing nearby for four days, so I set ForeFlight recording a track log before I went to bed last night to see if it did anything interesting.

Day 1. I took a quick look at the kmz. It records at 1 Hz. I don't see any dropped samples. The lat/long/alt distributions look tight, reasonably Gaussian, and don't appear to be correlated to one another. No visible trends. I forgot to put it in airplane mode/disable wifi so maybe it was getting positioning info from other sources.

https://itunes.apple.com/us/app/gps-diagnostic-satellite-test/id1020967894?mt=8

 

[GeorgeC]

Day 2. Remembered to turn on airplane mode and turn off wifi. Otherwise, about the same as day one.

 

[GeorgeC]

Day 3. Some interesting behavior. There were intervals where it just flatlined, as though it stopped receiving measurements but ForeFlight coasted the track, sometimes for up to nearly three minutes.

 

[GeorgeC]

Day 4 was similar to day 3.

 

[1RTK1]

Have you gone up in the air to see if your GPS is non functioning?

 

[GeorgeC]

Yeah, I fly with it all the time, just not in the middle of the night during test events